Part of my prep for the new table was trying to isolate it's shelf from vibration.
The metal shelf brackets had just been "mollie'd" to the drywall. I removed them, cut strips of the 3/4" thick anti-fatigue mat as long as the vertical part that touches the wall and re-installed them with "lag" screws into the studs. Then I put that yellow "poster-tak" stuff on the horizontal part for the shelf to rest on.
Now the bracket is isolated from the wall and the shelf isolated from the bracket.
Major difference! What I thought was WOW must have been the result of vibration. Where voices had a kind of "victrola" tone now they are clear. Bass is better defined.
Vibration is everything! Can't wait for Sunday. Stay tuned.